Due to the high filling factor, a power increase of up to 100% can be achieved in existing engines. The power increase depends on the boost pressure, which for passenger car engines is 0.4-0.8 bar (full boost pressure approx. 1.8 bar). If the boost pressure begins to exceed the factory-set value, the exhaust gas bypass valve opens, bypassing the turbine wheel, and the boost pressure decreases.
In addition to the engine power, the use of a turbocharger also increases the torque, which is especially desirable from the point of view of smooth engine operation. Compared to a petrol engine, the compression ratio of a diesel engine does not need to be reduced due to the use of turbocharging, so that even at low crankshaft speeds the injected fuel is fully utilized.
The turbocharger is an extremely precisely manufactured unit. Therefore, in case of repair, it is recommended to contact a specialist. As a rule, if a defect occurs, the turbocharger is replaced as an assembly.
The turbocharger is lubricated by engine oil from the engine lubrication system. To ensure adequate lubrication of the turbocharger bearings, the following requirements must be met.
Use only prescribed motor oils.
Running on too old engine oil can lead to coking of the turbocharger bearings. Therefore, the engine oil and oil filter must be changed strictly in accordance with the maintenance chart. Since even the smallest particles of dirt can cause destruction of the turbocharger, never run the engine without an air filter.
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